punypng: Open Source image compressor

punypng is a free png compression service that intelligently leverages multiple open-source png compression algorithms in the hopes of making the web  more puny, one png at a time. It handles 8-bit PNGs, 24-bit PNGs, JPEGs, GIFs and animated GIFs. It also leverages dirty transparency techniques to further optimize transparent images beyond what typical compressors like […]

punypng is a free png compression service that intelligently leverages multiple open-source png compression algorithms in the hopes of making the web  more puny, one png at a time. It handles 8-bit PNGs, 24-bit PNGs, JPEGs, GIFs and animated GIFs. It also leverages dirty transparency techniques to further optimize transparent images beyond what typical compressors like pngcrush can handle.

  • Clear affordances for # of bytes saved (as well as being pretty bar graphs)
  • JPEGs are analyzed to see if a compressed PNG format’s better (ex: JPEGs with heavy solid areas benefit from this).  But if not, don’t despair, punypng is backed with jpeg-tran and jpegoptim for further JPEG optimzation.
  • You can upload up to 50 files in a single session.
  • Download batch jobs as a single time-stamped ZIP.

More infopunypng